Not sure about the other lakes as the waters still pretty cool with ice just coming off recently but Muir is definitely starting to turn. The water has been open for quite a while, is rather shallow and with the 25c temps lately and the strong winds mixing it, you can see decaying matter making it's way to the surface. I don't believe Muir takes as long to turn as most lakes because of it's shallow depth, maybe give it another 4 or 5 days.